Rim constricting and expanding device



J. L. KALTREIDER AND C. F. SHRYOCK.

RIM CONSTRICTING AND EXPANDING DEVICE.

APPLICATION FILED ocv. 2B. i919.

1,385,377. Patented July 2 21.

2 SHEETSS J. L. KALTREIDER AND C. F. SHRYOCK.

RIM CONSTRICTING AND EXPANDING DEVICE.

APPLICATION FILED OCT. 23. I919.

Patented July 26, 1921.

2 SHEET5-SHEET Z.

/ 4. INVENTOR JLJf/VL T/fE/DE/i, cm/mma WITNESSES A TTOBWEYS JOHN LEWIS KALTREIDER AND CHARLES FRANKLIN SHRYOCK, OF HANOVER,

SYLVANIA.

RIM CONSTRICTING AND EXPANDING DEVICE.

Specification of Letters Patent.

Patented July 20, 1921.

Application filed October 28, 1919. Serial No. 333,977.

To all whom it my camera:

Be it known that We JoI-IN Lnwrs KAL'ranmnn and CHARLES FRANKLIN SI-rRYooK, citizens of the United States, and residents of Hanover, in the county of York and State of Pennsylvania, have invented certain new and useful Improvements in Rim constricting and Expanding Devices, of which the following is a specification.

Our invention relates to devices for constricting rims to allow the ready removal of the tire aud for expanding a rim to effect a perfect seating of the tire.

It is a purpose of our invention to provide a device of the above described character which is of simple and ei'licient construction and one which is easily operated in one direction to effect a constricting of the rim and in another direction to expand the same.

We will describe one form of rim constricting and expanding device embodying our invention, and will. then point out the novel features in claim.

In the accompanying drawings:

Figure 1 is a View showing in side elevation one form of device embodying our invention in applied position within a rim;

Fig. 2 is a transverse sectional view through a portion of the device showing the gripping members in active position;

Fig. 3 is a View similar to Fig. 2, showing the gripp'ng members in inactive position;

Fig. 4 is a fragmentary sectional View, taken on the line 4-4 of ig. 1;

Fig. 5 is a vertical sectional view of the hub shown in Fig. 1; and

Fig. 6 is a pers ective view of one of the plates shown in ig. 1.

Similar reference characters refer to similar parts in each of the several views.

Referring specifically to the drawings, and particularly to Fig. 1, H designates a hub formed of suitable metal and which comprises a body portion 15 of annular formation, and openings 16 extending radially of the body and having their walls formed with screw threads. Extending radially from the hub H are a plurality of arms designated generally at A, each of the arms having its inner end 17 formed with screw threads and disposed within one of the openings 16. Adjacent the end 17 each arm A is formed with a square 18 to facilitate the rotation of the arm and to thereby cause the same to move inwardly or outwardly with relation to the hub through the me-- dium of the screw threads as will be understood. The outer end of each arm A war-- ries a plate P of substantially rectangular formation, such plate being detachably associated with the arm by means of a collar 19, which is formed on the inner side of the plate and receives the outer end of the arm A. As shown in Fig. 2, the outer end of each arm A. is formed with an annular groove 20 which receives the inner ends of a pair of set screws 21 so that the latter lock the collar upon the arm.

As shown in Fig. 6, the opposite transverse edges of each plate 1 carry gripping members G, each of which is pivotally mounted in the walls of a recess 22 by means of a pin 23. As shown in Fig. 2, the pivoted end of each gripping member is squared and is adapted to engage a leaf spring 2% for maintaining the gripping member in inactive or active position. Each spring 24;

is secured at its inner end to the inner side of the plate P by means of a screw 25, while its outer end. extends into the recess 22 and is bent with its extreme end curved downwardly. The outer or free end. of each grip ping member G is curved inwardly to provide a hook 36. the hooks of each pair of gripping members coacting when the gripping members are in active position to retain a rim R in contiguous relation to the plate P.

As shown in Fig. 1, the rim R is of the demountable type, and is split to permit restricting of the same for effecting the re' moval of a tire T.

From the foregoing description, taken in conjunction. with the accompanying drawings the operation of the rim device will be apparent as follows:

To apply the device to a rim, the arms A are adjusted manually by applying a wrench to the nuts 18 and rotating the arms so that they will feed within the hub, H. With the arms in this contracted position, the device may now be inserted within the rim R and by rotating the arms in the opposite direction to that just described they are fed outwardly so as to cause the plates P to snugly engage the inner periphery of the rim R. In this position of the device, the gripping members G are moved from the inactive position shown in Fig. 8 to the active position As soon as such rim shown in Fig. 4 so that the hooks the flanges of the rim R, as shown in Fig. 2. It it is desired to constrict the rim to effect a removal ofthe tire, one of the arms A adjacent the ends of the rim R is fed inwardly toward the hub H thereby forcing the corresponding rim end inwardly toward the hub. end disengages the other rim end, it will occupy an overlapped position with respect to either rim end so that the circumference of the rim as a whole is reduced snificiently to permit the removal of the tire T. It will be understood that the rim is retained in this constricted condition to allow the replacement of the'tire, and after the tire has been replaced the rim may be returned to its normal position by actuating the above referred to arm so that the coresponding rim end is expanded to its normal position.

Should the rim It become distorted so as not to properly seat around the inside of the tire casing, it will be obvious that by rotating all of the arms A so that they will be iedoutwardly with respect to the hub, uniform expansion of the rim is secured thereby causing the same to snugly seat against the tire casing so as to properly support the tire upon a wheel.

26 engage Although we have herein shown and described only one form of rim constricting and expanding device, it is to be understood that various changes and modifications may be made herein without departing from the spirit of the invention or the spirit and scope of the appended claim.

Having thus described our claim:

A rim contracting tool comprising a hub, arms having threaded engagement with the hub and extending radially from the same, flat plates carried by the outer ends of said arms and having their end portions formed with longitudinal slots, hooks having their rear portions pivoted within said slots, and springs secured to the under side of said flat plates and having their terminal portions contacting with the shanks of said hooks to secure the hooks in active or inactive position, the ends of said springs being curved away from said hooks, each of said arms being adjustable independently of the other arms, whereby a portion of the rim may be contracted or expanded imlependently of the remaining portions of the rim.

JOHN LEWVIS KALTREIDER. CHARLES FRANKLIN SHRYOCK.

invention, we 

